1 /* 2 * Copyright 2020 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ANDROID_GRAPHICS_MATRIX_H 18 #define ANDROID_GRAPHICS_MATRIX_H 19 20 #include <jni.h> 21 #include <cutils/compiler.h> 22 #include <sys/cdefs.h> 23 24 __BEGIN_DECLS 25 26 /** 27 * Returns an array of floats that represents the 3x3 matrix of the java object. 28 * @param values The 9 values of the 3x3 matrix in the following order. 29 * values[0] = scaleX values[1] = skewX values[2] = transX 30 * values[3] = skewY values[4] = scaleY values[5] = transY 31 * values[6] = persp0 values[7] = persp1 values[8] = persp2 32 * @return true if the values param was populated and false otherwise. 33 34 */ 35 ANDROID_API bool AMatrix_getContents(JNIEnv* env, jobject matrixObj, float values[9]); 36 37 /** 38 * Returns a new Matrix jobject that contains the values passed in as initial values. 39 * @param values The 9 values of the 3x3 matrix in the following order. 40 * values[0] = scaleX values[1] = skewX values[2] = transX 41 * values[3] = skewY values[4] = scaleY values[5] = transY 42 * values[6] = persp0 values[7] = persp1 values[8] = persp2 43 * @return The matrix jobject 44 */ 45 ANDROID_API jobject AMatrix_newInstance(JNIEnv* env, float values[9]); 46 47 __END_DECLS 48 49 #endif // ANDROID_GRAPHICS_MATRIX_H 50